Tennis is a good aerobic workout although singles is more effective than doubles.
Sally Gunnell, Kathryn Leigh BE YOUR BEST: How Anyone can become Fit, Healthy and Confident (2002)
The best worship is almost like an aerobic workout.
Christianity Today (2000)
In a typical game of badminton, contestants expend as much energy as in running a mile; singles games give the most vigorous aerobic workout.
Times, Sunday Times (2008)